Subaru Ascent 2019–2022 — technical service bulletin
Bulletin 11-204-23 · NHTSA communication 10235307 · issued Apr 25, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019–2022
model years
10
vehicle entries
Official summary
This Service Information Bulletin announces a design change made to the Positive Crankcase Ventilation (PCV) hose assembly.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.